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| Analysis and comparison of chemical composition in peony seed oil and flaxseed oil |
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| DOI： |
| KeyWord:peony seed oil flaxseed oil chemical composition triglyceride tocopherol squalene sterol |
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| Abstract: |
| Peony seed oil and flaxseed oil belong to linolenic acid type oil. The chemical compositions of peony seed oil and flaxseed oil such as fatty acid composition, triglyceride profile, tocopherol, squalene and sterol were investigated. The results showed that the predominant fatty acid in peony seed oil was linolenic acid(45.41%-45.92%), followed by linoleic acid and oleic acid with contents of 23.72%-26.34% and 20.32%-23.20%, respectively. Linolenic acid (54.93%), oleic acid (19.92%) and linoleic acid(16.26%) were the main fatty acids in flaxseed oil. The major triglycerides in peony seed oil were LLLn+OLnLn, LLL+OLLn and LLnLn, and their contents were 21.37%-21.67%, 14.88%-1544% and 13.56%-14.98%, respectively. Meanwhile, LnLnLn(23.10%), LLLn+OLnLn(18.44%)and LLnLn(13.41%) were the main triglycerides in flaxseed oil. γ-Tocopherol was the major tocopherol in both peony seed oil and flaxseed oil. The content of γ-tocopherol was 82361-963.17 mg/kg in peony seed oil, which was 487.75 mg/kg in flaxseed oil. Squalene content was 28.60-62.66 mg/kg in peony seed oil, which was 18.00 mg/kg in flaxseed oil. The contents of total sterol in ‘Fengdan’ peony seed oil produced in Anhui and Shandong were the highest with more than 4 600 mg/kg, which was 3 269.49 mg/kg in flaxseed oil. Sitosterol was the richest sterol in peony seed oil, which accounted for 55.50%-62.17% of total sterols, followed by Δ5-avenasterol(25.28%-28.01%). Sitosterol was also the richest sterol in flaxseed oil, which accounted for 52.59% of total sterols, followed by 24-methylenecholesterol, campesterol and Δ5-avenasterol. |
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